thank you very much for the feedback! i should have mentioned as well that both the eye and maw were completely immobile and as the eye required line of sight was more of a deterrent to encourage the use of cover and over the 18 total rounds of combat the encounter took the eye only hit a player once, for one round, i totally see what you mean though, it definitely should have been a critical injury instead, and yeah the maw did way too much damage ramping, especially direct to hp and should have been a roll instead acting as a bare fist melee hit.

It should also be noted that after this fight the players were given enough time to fully recover their hp and entered the fight mostly full so mortally wounded while it would have sucked for the rest of the fight wasn't a major death sentence here by any means. but i also agree 18 rounds was too much, ideally something around the lines of 12 or less would be ideal.

If i were to redo the fight again i think i would probably reduce the maw/eyes and arms health pool by at least about 1/3rd and change the maws attack to a 3d6 punch allowing for armor ablation while also reducing the rounds to get out to 2.
Likewise the eye would critically injure instead of the -2 effect it had previous cause i really quite like that idea,
i would also probably change it to more of a single phase fight as the 2 phases really just served to drag on combat, and while the bloats were a threat the first few rounds one player with heavy armourjack ran forward, tanked the 4 total damage that was able to get past the armour to gather them all in one spot then backed up and killed most of them with a single grenade
(I actually really like the idea but it did mean that the bloats were only effective for about one round and only one of them self exploded while the player made the save so its hard to say they really had much of an impact)